Objection to Notice of Default Listing at Credit Bureau: Unfair treatment and Day Light *******

I am writing to dispute the following information, Cartrack debited an inaccurate amount of R2000 together with R291 in October 2021 and I enquired from their offices after I noticed it in my bank statement and I was told that it was a mistake and it will be deposited back in my account, that didn't happened I kept on enquiring about it until I reversed the amount from the bank and stop the debit, In November 2021, they debited my account again with the amount of R2250, Again I reverse it and inform them about inaccurate amounts , they promised to make the investigations but they didn't respond, but they continued to debit and change the amounts every month until this year January 2022. When I contact their offices, I was told that I owe them, they have changed the story. Fortunately I have all my banking statement that can prove that my account is up to date on monthly basis. Our three years contract has ended last year and they make this tricks of milking my account and now they have blacklisted me at Credit Bureau because they have all the powers to destroy innocent customers. Now they have send me a notice of default listing at Credit Bureaus. Today, 02 February 2022, they called me to say they want to install a new tracking device on my bakkie, something that I didn't request, but they refused to investigate this matter of inaccurate debits on my account. Until today nothing has been investigated but they enjoy to terrorize me and destroy my profile at Credit Bureau